I am new to this forum, and i'm just trying to find out the holding capacity of my fresh water tank. I have a 1992 Hi Lo, model# 2293L

Welcome to the forum. I sure if you look in the library section you will find a brochure for your yr.or close to it. It should give the tank capacities.

Welcome to the forum. This should give you a lot of answers. It's for a '93 but there are not much differences between model years.

http://www.hilotrailerforum.com/f52/1993-brochure-1076/

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"Ruben"
2404T, 2003 2500HD 4X4 GMC Sierra SLT Crew Cab w/Astro camper shell and 2003 Chevy Tahoe LE 4X2
Far West Texas

If you still cannot find what you are looking for try this: length x width x height {in inches} divided by 231= gallons. I use to build custom aquariums and knew that formula well.

I filled a 5 gallon water bottle and poured it into my empty tank. Then measured the height. It was 1/4 of the total. I drew a line there and at 1/2 half for a quick visual indicator since mine doesn't have sensors.
If I had that formula Giz-Liz I would not have had to lug that 5 gallon bottle. 5 x 8.3 = 41.5 pounds.